CN211047311U

CN211047311U - Human body induction and self-adaptive light supplementing access control system

Info

Publication number: CN211047311U
Application number: CN201922386770.5U
Authority: CN
Inventors: 李玲; 李前山; 蒋少文
Original assignee: SHENZHEN WELBELL INTELLIGENT TECHNOLOGY CO LTD
Current assignee: SHENZHEN WELBELL INTELLIGENT TECHNOLOGY CO LTD
Priority date: 2019-12-26
Filing date: 2019-12-26
Publication date: 2020-07-17
Anticipated expiration: 2029-12-26

Abstract

The utility model discloses a human response and self-adaptation light filling access control system, including the light intensity collection module who is connected with host system respectively, human response module, light filling adjustment module, human response module's heat release infrared sensor passes through second voltage follower circuit respectively with host system, detection module is connected, according to the voltage difference value trigger interval of two third L M358 power amplifier transmissions in the detection module, calculate human infrared inductor's trigger interval, thereby through the third L M358 power amplifier that sets up two specific voltage trigger values, set for required human infrared inductor's trigger interval, fourth L M358 power amplifier in the detection module receives two third L M358 power amplifier output voltage signal, and carry the high level signal of specified value to host system, host system judges current light intensity environment and human body again and is close to the distance, the square wave of output adaptation frequency gives light filling drive circuit, it lights L ED light filling lamp gradually, prevent the mistake and touch, improve system and use reliability.

Description

Human body induction and self-adaptive light supplementing access control system

Technical Field

The utility model relates to an entrance guard technical field, in particular to human response and self-adaptation light filling access control system.

Background

The entrance guard terminal with the face recognition function can collect face information of a user to be authenticated, compares the collected face information with data stored in an information base, and opens the entrance guard terminal if the comparison is successful. Entrance guard's terminal mainly installs in district or office building entrance, and light environment is complicated changeable, under the not enough condition of light intensity, generally adjusts light through the installation light filling lamp on entrance guard's terminal, improves entrance guard's terminal recognition efficiency. People are too close to the entrance guard terminal or the light supplement lamp is suddenly turned on, so that the eyes of people are easily uncomfortable, and therefore a light ray adjusting device needs to be arranged on the entrance guard terminal.

In the prior art, a cds photoresistor is usually adopted to adjust light of a light supplement lamp, wherein one mode is that the cds photoresistor is used as a valve switch, the cds photoresistor can present different resistance values along with different light intensities, a specific voltage is obtained in a resistance voltage division mode, then the specific voltage is connected to a base electrode of a triode, and when the specific voltage reaches a set value, the triode is conducted to realize light supplement; the other mode is that a cds photoresistor is directly connected to a feedback end of the boot power supply, and different voltage values are obtained by utilizing the characteristic that the photoresistor presents different resistance values along with different light intensities, so that the light supplement intensity is adjusted. Both the two light supplementing methods cannot flexibly adapt to a complex light intensity change environment, and a user needs to search for a proper distance and an appropriate angle matching access control recognition system, so that the use experience is reduced.

SUMMERY OF THE UTILITY MODEL

The utility model provides a human response and self-adaptation light filling access control system aims at being close to distance and environment light intensity automatic adjustment light filling lamp intensity according to the human body, promotes the user and uses experience.

In order to achieve the above object, the utility model provides a human response and self-adaptation light filling access control system, including the light intensity collection module, human response module, the light filling adjustment module that are connected with the host system, the light intensity collection module is equipped with a photodiode, photodiode is connected with the first level end of host system through a first voltage follower circuit, the human response module is equipped with a heat release infrared sensor, heat release infrared sensor output and the first L M358 power amplifier input of a second voltage follower circuit are connected, first L M358 power amplifier first output with the host system second level end is connected, first L M358 power amplifier second output is connected with a detection module input that is used for predetermineeing human being and is close to the distance, the detection module output with the third level end of host system is connected, the light filling adjustment module includes L ED lamp and light filling drive circuit of interconnect, the light filling drive circuit input with the host system output of square wave module is connected.

Preferably, the detection module includes a power amplifier circuit, a first comparison circuit, and a second comparison circuit, an input end of a second L M358 power amplifier in the power amplifier circuit is connected to a second output end of a first L M358 power amplifier in the second voltage follower circuit, output ends of the second L M358 power amplifier are connected to input ends of two third L M358 power amplifiers connected in parallel in the first comparison circuit, output ends of the two third L M358 power amplifiers are connected to input ends of a fourth L M358 power amplifier in the second comparison circuit, and output ends of the fourth L M358 power amplifier are connected to a third level end of the main control module;

the first L M358 amplifier, the second L M358 amplifier, the third L M358 amplifier and the fourth L M358 amplifier are all configured as L M358 dual operational amplifiers.

Preferably, two parallel third L M358 amplifiers in the first comparison circuit are set as L M358 dual operational amplifiers with two different voltage trigger values.

Preferably, the photodiode is provided as a model L Y3P550BY photodiode.

Preferably, the pyroelectric infrared sensor is a pyroelectric infrared sensor of a D203S model.

Preferably, the supplementary lighting driving circuit is an L P3302S model supplementary lighting driving circuit.

Compared with the prior art, the beneficial effects of the utility model are that according to two third L M358 power amplifier voltage trigger value difference intervals in the detection module, calculate human infrared inductor's the interval that triggers, thereby through setting up the third L M358 power amplifier of two specific voltage trigger values, set for required human infrared inductor's the interval that triggers, prevent that the human body from being too close to L ED light filling and arousing people's eye discomfort, or the human distance is too far away from entrance guard terminal is difficult to catch effective shooting picture.

The fourth L M358 power amplifier in the detection module receives voltage signals output by the two third L M358 power amplifiers, when the voltage signals output by the two third L M358 power amplifiers are within a preset voltage difference interval, the fourth L M358 power amplifier transmits a high level signal with a specific value to the main control module, the main control module judges the current light intensity environment and the approaching distance of a human body, a square wave with adaptive frequency is output to the light supplementing driving circuit, the light supplementing driving circuit triggers L ED light supplementing lamps to gradually light up, meanwhile, false touch can be prevented, and the use reliability of the access control system is improved.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.

FIG. 1 is a block diagram of the present invention;

FIG. 2 is a schematic diagram of a first voltage follower circuit according to the present invention;

FIG. 3 is a schematic diagram of a second voltage follower circuit according to the present invention;

FIG. 4 is a schematic diagram of the power amplifier circuit of the present invention;

fig. 5 is a schematic diagram of the connection between the first comparison circuit and the second comparison circuit of the present invention;

fig. 6 is a schematic diagram of the light supplement driving circuit of the present invention.

The objects, features and advantages of the present invention will be further described with reference to the accompanying drawings.

Detailed Description

The utility model provides a human response and self-adaptation light filling access control system, as shown in figure 1, include the light intensity collection module, human response module, the light filling regulation module of being connected with host system 1, the light intensity collection module is equipped with a photodiode 21, photodiode 21 is connected with host system 1 first level end through a first voltage follower circuit 22, human response module is equipped with a heat and releases infrared sensor 31, heat releases infrared sensor 31 output and is connected with the first L M358 power amplifier input in the second voltage follower circuit 32, the first output of first L M358 power amplifier with host system 1 second level end is connected, first L M358 power amplifier second output is connected with a detection module 33 input that is used for predetermineeing the human body and is close to the distance, detection module 33 output with host system 1 third level end is connected, light filling regulation module includes L ED lamp 41 and light filling drive circuit 42 of interconnect, host system 1's output with light filling drive circuit 42 input is connected.

In this embodiment, the main control module 1 is configured as a RK3288 type main control, as shown in fig. 2, the photodiode 21 is connected to the first ADC interface of the main control module 1 through a L M358 dual operational amplifier in a first voltage follower circuit 22, the photodiode 21 detects a light environment, and performs voltage following through a L M358 dual operational amplifier in the first voltage follower circuit 22 to obtain a stable voltage, the stable voltage is transmitted to the first ADC interface, and the main control module 1 analyzes and calculates the current ambient light intensity according to the voltage value received by the first ADC interface.

The pyroelectric infrared sensor 31 is set to be a pyroelectric infrared sensor of a D203S model and used for detecting infrared rays emitted by a human body, different voltage values are fed back according to the distance close to the human body, the pyroelectric infrared sensor of the D203S model is only sensitive to infrared rays with specific wavelengths and inhibits infrared rays with other wave bands, the anti-interference capability is strong, and the wavelength range which can be sensed by the pyroelectric infrared sensor 31 is selected to be 5-14 microns. The higher the temperature is, the shorter the infrared wavelength is, that is, the closer the human body is to the access terminal, the shorter the infrared wavelength received by the pyroelectric infrared sensor 31 is, and thus, the distance required by the human body to approach the access terminal can be detected by the pyroelectric infrared sensor 31.

The second voltage follower circuit 32 follows the voltage, and the stable pyroelectric infrared sensor 31 feeds back the voltage value of the human body approaching distance to obtain a stable voltage, as shown in fig. 3, a first output end of a first L M358 power amplifier in the second voltage follower circuit 32 is connected to a second ADC interface of the main control module 1, and the main control module 1 analyzes and calculates the current human body approaching distance according to the voltage value received by the second ADC interface.

Specifically, the detection module 33 includes a power amplifier circuit 331, a first comparison circuit 332, and a second comparison circuit 333, as shown in fig. 4 and 5, the second L M358 amplifier input terminal in the power amplifier circuit 331 is connected to the second output terminal of the first L M358 amplifier in the second voltage follower circuit 32, the second L M358 amplifier output terminal is connected to the two third L M358 amplifier input terminals in the first comparison circuit 332, the two third L M358 amplifier output terminals are connected to the fourth L M358 amplifier input terminal in the second comparison circuit 332, the fourth L M358 amplifier output terminal is connected to the third level terminal of the main control module 1, and the first L M358 amplifier, the second L M358 amplifier, the third L M358 amplifier and the fourth L M358 amplifier are both set as a dual L M amplifier L operational amplifier.

The main control module 1 receives the voltage signal output by the first L M358 amplifier in the second voltage follower circuit 32, and at the same time, the second L M358 amplifier in the power amplifier circuit 331 also receives the voltage signal output by the second voltage follower circuit 32, amplifies the voltage signal and transmits the amplified voltage signal to the first comparison circuit 332, two third L M358 amplifiers connected in parallel in the first comparison circuit 332 are set as L M358 dual operational amplifiers with two different voltage trigger values, and the trigger interval of the human infrared sensor is converted according to the difference interval of the voltage trigger values transmitted by the two third L M358 amplifiers, so that the required trigger interval of the human infrared sensor can be set by setting the third L M358 amplifier with two specific voltage trigger values, and the phenomenon that the light of the ED light 41 at a human body distance of too close L is too strong to cause discomfort of human eyes or the door forbidden terminal at a human body distance of too far away is difficult to capture effective shooting pictures is prevented.

The two third L M358 power amplifiers in the first comparison circuit 332 transmit the received voltage values to the fourth L M358 power amplifier in the second comparison circuit 333, the fourth L M358 power amplifier is connected to the PGIO interface of the main control module 1, when the voltage signals output by the two third L M358 power amplifiers are within a preset voltage difference interval, the fourth L M358 power amplifier transmits a high level signal with a specific value to the PGIO interface of the main control module 1, otherwise, outputs a low level signal, after receiving the high level signal with the specific value, the main control module 1 reads the voltage signals at the first ADC interface and the second ADC interface, determines the current light intensity environment and the approaching distance of the human body, analyzes, outputs a square wave with an adaptive frequency to the fill light driving circuit 42, the fill light driving circuit 42 is activated, and outputs a specific voltage to the L ED lamp 41, and the L ED fill light lamp 41 to gradually light up, thereby providing a soft light environment.

The supplementary lighting driving circuit 42 is a supplementary lighting driving circuit of model L P3302S, as shown in fig. 6, for a schematic diagram of the supplementary lighting driving circuit 42, the supplementary lighting driving circuit 42 is connected to a PWM interface of the main control module 1, the supplementary lighting driving circuit 42 changes a voltage applied to the L ED supplementary lighting lamp 41 by inputting square waves of different frequencies, and further changes the brightness of the L ED supplementary lighting lamp 41.

The above only is the preferred embodiment of the present invention, not limiting the scope of the present invention, all the equivalent structure changes made by the contents of the specification and the drawings under the inventive concept of the present invention, or the direct/indirect application in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A human body induction and self-adaptive light supplement access control system is characterized by comprising a light intensity acquisition module, a human body induction module and a light supplement adjusting module, wherein the light intensity acquisition module is connected with a main control module and is provided with a photosensitive diode, the photosensitive diode is connected with a first level end of the main control module through a first voltage follower circuit, the human body induction module is provided with a pyroelectric infrared sensor, the output end of the pyroelectric infrared sensor is connected with the input end of a first L M358 power amplifier in a second voltage follower circuit, the first output end of a first L M358 power amplifier is connected with a second level end of the main control module, the second output end of the first L M358 power amplifier is connected with the input end of a detection module for presetting human body approaching distance, the output end of the detection module is connected with a third level end of the main control module, the light supplement adjusting module comprises a L ED lamp and a light supplement driving circuit which are connected with each other, and the input end of the light supplement driving circuit is connected with a square wave output end of the main control module.

2. The human body induction and adaptive light supplementing access control system according to claim 1, wherein the detection module comprises a power amplifier circuit, a first comparison circuit and a second comparison circuit, wherein an input end of a second L M358 power amplifier in the power amplifier circuit is connected with a second output end of a first L M358 power amplifier in the second voltage follower circuit, output ends of the second L M358 power amplifier are connected with input ends of two third L M358 power amplifiers connected in parallel in the first comparison circuit, output ends of the two third L M358 power amplifiers are connected with input ends of a fourth L M358 power amplifier in the second comparison circuit, and output ends of the fourth L M358 power amplifier are connected with a third level end of the main control module;

3. The human body induction and adaptive light supplementing access control system according to claim 2, wherein two parallel third L M358 power amplifiers in the first comparison circuit are set as L M358 double operational amplifiers with two different voltage trigger values.

4. The human body induction and adaptive light supplementing access control system according to claim 1, wherein the photodiode is a L Y3P550BY type photodiode.

5. The human body induction and adaptive light supplementing access control system according to claim 1, wherein the pyroelectric infrared sensor is a pyroelectric infrared sensor of a D203S model.

6. The human body induction and self-adaptive light supplement access control system according to claim 1, wherein the light supplement driving circuit is a L P3302S type light supplement driving circuit.